Best Mattress For Side Sleepers Under 130 Lbs

Finding the best mattress for side sleepers under 130 lbs can feel like a quest for the holy grail of sleep.

The key is pinpointing a mattress that offers superb pressure relief for shoulders and hips while providing adequate support to maintain spinal alignment, all without feeling too firm for lighter individuals.

For side sleepers in this weight category, softer to medium-soft mattresses are often the sweet spot, as they allow for sufficient contouring without creating pressure points.

Think about how a tailored suit fits versus a boxy one – you want that customized give. Black Friday Weights Sale

Many popular brands now offer specialized models or firmness options designed to cater to lighter body types, utilizing materials like memory foam, latex, or even sophisticated hybrid constructions to achieve that elusive balance of comfort and support.

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It’s about optimizing for that pressure point surrender.

Here’s a comparison of some top contenders that consistently deliver for lighter side sleepers:

Product Name	Key Features	Price Average	Pros	Cons
Nectar Premier Copper	14″ profile, copper and phase-change material cover, gel memory foam, dynamic support layer.	$1,599 – $2,999	Excellent pressure relief, good for temperature regulation, minimizes motion transfer.	Can be heavy to move, may have a slight off-gassing smell initially.
Saatva Loom & Leaf Relaxed Firm	12″ premium foam, 5-lb memory foam, spinal zone technology, eco-friendly materials.	$1,800 – $3,500	Luxurious feel, superior back support, durable construction, no off-gassing.	Higher price point, not ideal for those who prefer an extremely soft feel.
DreamCloud Premier	14″ hybrid, cashmere-blend cover, gel memory foam, individually wrapped coils, targeted support.	$1,200 – $2,500	Great balance of comfort and support, good edge support, responsive.	Can feel slightly firmer than pure memory foam, some may find it too bouncy.
Layla Memory Foam	Flippable soft/firm, copper-infused memory foam, excellent pressure relief.	$1,000 – $1,900	Versatile firmness options, antimicrobial properties, good motion isolation.	Can retain some heat on the soft side, may not have as much edge support.
Bear Original	10″ all-foam, Celliant cover for recovery, graphite-infused memory foam, responsive transition foam.	$800 – $1,500	Designed for active individuals, good pressure relief, cooling features.	May feel too firm for some lighter side sleepers, less edge support than hybrids.
Helix Midnight Luxe	14″ hybrid, Tencel cover, memory foam comfort layer, individually wrapped coils, zoned lumbar support.	$1,800 – $3,200	Specifically designed for side sleepers, excellent contouring, luxurious feel.	Higher cost, can be heavy, some may find the zoning too specific.
Brooklyn Bedding Aurora Luxe Soft	13″ hybrid, CopperFlex foam, TitanFlex foam, individually wrapped coils, cooling cover.	$1,600 – $2,800	Exceptional cooling, great pressure relief, available in multiple firmness options, including soft.	Can be a significant investment, softer feel might not suit all lighter sleepers.

The Science of Sleep: Why Lighter Side Sleepers Need Specific Support

Ever tried to sleep on a rock-hard surface when you’re built like a feather? It’s not pretty.

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For side sleepers, especially those under 130 lbs, the standard “medium-firm” mattress can feel like sleeping on a wooden plank. This isn’t just about comfort. it’s about biomechanics.

When you lie on your side, your body weight is concentrated on narrower areas like your shoulders and hips.

If the mattress is too firm, these points don’t sink in enough, leading to pressure build-up, misalignment of the spine, and ultimately, pain.

• Pressure Point Relief: Lighter individuals exert less force on the mattress. This means they need a softer top layer that can contour closely to the curves of their body – particularly the shoulders and hips – without resistance. Think of it like a memory foam pillow for your whole body. Without proper contouring, you end up with “hot spots” where pressure accumulates, leading to numbness, tingling, or morning aches.
• Spinal Alignment: The goal is a neutral spine. For side sleepers, this means a mattress that allows the hips and shoulders to sink just enough so that the spine remains a straight line from neck to tailbone. If the mattress is too firm, your hips and shoulders are propped up, creating an unnatural curve. If it’s too soft a rare issue for lighter people, but possible, you might sag too much, also causing misalignment. The sweet spot is that delicate balance where the mattress cradles you, not just supports you.
• Material Matters: Certain materials inherently offer better pressure relief for lighter folks. Memory foam is a classic for its conforming properties. Latex can offer a buoyant contour. Hybrid mattresses, combining coils with foam layers, can provide the best of both worlds: pressure relief from the foam and targeted support from the coils. The key is the density and responsiveness of these materials for lighter weights.

Decoding Mattress Firmness for the Lightweight Side Sleeper

Firmness ratings can be tricky because “medium-firm” to a 250-lb person feels like “extra-firm” to a 100-lb person. It’s all relative.

For side sleepers under 130 lbs, you’re generally looking for something on the softer side of the spectrum, typically a 4-6 on a 1-10 firmness scale with 10 being the firmest. Nordictrack Commercial 2450 Weight

• The “Goldilocks Zone”: You want a mattress that’s “just right.” Too firm, and you won’t get the necessary pressure relief, leading to shoulder and hip pain. Too soft, and while rare for lighter individuals, you might lack adequate support and experience sagging, which can throw your spine out of alignment.
• Ideal Firmness Profiles:
  • Soft 3-4/10: Often preferred by very light side sleepers who need maximum sinkage and contouring. These mattresses excel at cradling the body.
  • Medium-Soft 4-5/10: A popular choice, offering a good balance of plush comfort and support. This allows for sufficient sinkage at pressure points while still maintaining overall spinal alignment.
  • Medium 5-6/10: Some lighter side sleepers, especially those closer to the 130 lb mark or who prefer a slightly more “on top” feel, might find a medium mattress comfortable, provided its comfort layers are adequately plush.
• How to Test Beyond the Showroom: Since firmness is subjective, paying attention to user reviews from people with similar body types is crucial. Many online mattress companies offer generous home trial periods 100 nights or more, which is the best way to truly gauge if a mattress hits your personal firmness sweet spot. After all, you’re looking for sustained comfort, not just a five-minute feel.

Material Deep Dive: Memory Foam, Latex, and Hybrids

The mattress market is a labyrinth of materials, each promising the best sleep of your life.

For lighter side sleepers, understanding how these materials interact with your body weight is paramount.

• Memory Foam:
  • Pros: This material is the king of contouring and pressure relief. It softens with body heat and molds precisely to your curves, distributing weight evenly. This is fantastic for relieving pressure on shoulders and hips. Excellent motion isolation, meaning if your partner tosses and turns, you’re less likely to feel it.
  • Cons: Traditional memory foam can retain heat, leading to a “sleeping hot” sensation. Some people dislike the “stuck” feeling, where it takes a moment to change positions. Off-gassing a temporary chemical smell can also occur.
  • Best for Lighter Side Sleepers: Look for memory foam mattresses with lower density comfort layers often around 3-4 lbs/cu ft or those infused with cooling agents like gel, copper, or graphite to mitigate heat retention. The Nectar Premier Copper is a prime example of a memory foam option designed with advanced cooling and deep pressure relief.
• Latex:
  • Pros: Latex, derived from rubber trees or synthetic, offers a unique buoyant feel. It contours well but has a quicker response time than memory foam, so you don’t feel “stuck.” It’s naturally durable, hypoallergenic, and often sleeps cooler than traditional memory foam. Available in Dunlop denser, more supportive and Talalay softer, more conforming varieties.
  • Cons: Generally more expensive than memory foam. Can be quite heavy. Some people prefer the deep hug of memory foam over the buoyant feel of latex.
  • Best for Lighter Side Sleepers: Talalay latex is usually the better choice for lighter side sleepers due to its softer, more conforming properties. It provides excellent pressure relief while allowing for easier movement.
• Hybrid:
  • Pros: Hybrids combine the best of both worlds: a coil support core typically individually wrapped coils topped with comfort layers of memory foam, latex, or proprietary foams. This combination offers excellent support, good pressure relief, superior breathability coils allow airflow, and often better edge support than all-foam models. The coils provide responsiveness, making it easier to move around.
  • Cons: Can be more expensive and heavier than all-foam mattresses. The quality can vary significantly based on the type and quantity of coils and foam layers.
  • Best for Lighter Side Sleepers: Many hybrid mattresses now feature softer top layers specifically designed for pressure relief, while the coils provide targeted support that prevents excessive sinkage. The Helix Midnight Luxe and DreamCloud Premier are excellent examples of hybrids that cater to side sleepers, offering a balance of contouring comfort and underlying support.

The Impact of Mattress Thickness and Support Layers

It’s not just about the soft top layer.

The entire construction of the mattress plays a critical role, especially for lighter sleepers who need nuanced support.

• Comfort Layer Thickness: For lighter side sleepers, a comfort layer that is too thin will allow them to “bottom out” and feel the firmer support layers beneath, negating the pressure relief. Aim for a comfort layer the top layer of foam or latex that is at least 2-3 inches thick, but preferably 3-4 inches for optimal contouring and sinkage. This ensures there’s enough material to cradle the shoulders and hips effectively.
• Support Core: Beneath the comfort layers lies the support core.
  • All-Foam: In all-foam mattresses, this is typically a high-density polyfoam base. For lighter sleepers, this layer needs to be firm enough to provide stability and prevent sagging over time, but not so firm that it feels like a brick. The overall thickness of the mattress 10-12 inches often suffice contributes to its durability and how well it isolates motion.
  • Hybrid: In hybrids, the support core consists of individually wrapped coils. These coils can be zoned, meaning different areas offer varying levels of support. For side sleepers, zoned support is fantastic because it can provide softer support for the shoulders and hips while firmer support for the lumbar region, promoting optimal spinal alignment. The coil gauge thickness of the wire and number of coils also impact support and durability.
• Overall Mattress Thickness: While some thinner mattresses 8-9 inches can work, they often lack the multiple layers needed to provide optimal pressure relief and support for side sleepers, especially over the long term. A mattress in the 10-14 inch range usually has sufficient layering to deliver that plush top for contouring and a robust base for support, preventing premature sagging and ensuring a comfortable, pain-free sleep.

Considering Sleep Position and Spinal Alignment

Your sleep position is the single biggest determinant of what kind of mattress you need. Difference Between Theragun Prime And Elite

For side sleepers, the mission is always to maintain a straight line from your head to your tailbone. Any deviation can lead to aches and pains.

• The Side Sleeper’s Dilemma: When you lie on your side, your body isn’t flat. Your shoulders and hips protrude, while your waist curves inward. A mattress that’s too firm won’t allow these broader parts to sink in, leading to a bent spine and pressure points. A mattress that’s too soft again, rare for lighter folks, but possible if the support core is weak will let your midsection sink too far, creating a hammock effect and also misaligning your spine.
• Achieving Neutral Alignment:
  • Cradling: The top comfort layers must be soft enough to allow your shoulders and hips to sink just enough to align with the rest of your body. Imagine your spine as a ruler. you want it to stay straight, not bend.
  • Support: The underlying support layers or coils in a hybrid must then push back just enough to keep your waist from sinking too far. This delicate balance is what prevents morning stiffness and pain.
  • Pillow Matters: Don’t forget your pillow! For side sleepers, a thicker, firmer pillow is crucial to fill the gap between your head and the mattress, keeping your neck aligned with your spine. A perfect mattress can still lead to neck pain if your pillow isn’t right.
• Signs of Misalignment: If you wake up with shoulder pain, hip pain, lower back pain, or neck stiffness, your mattress or pillow, or both isn’t providing proper spinal alignment for your side-sleeping posture. It’s an alarm bell indicating your sleep surface isn’t doing its job.

Sleep Smarter: Budgeting and Trial Periods

Investing in a mattress is a significant decision.

You spend roughly one-third of your life on it, so it’s not a place to skimp.

However, “expensive” doesn’t always equal “best,” especially when you’re targeting a specific need like lighter side sleepers.

• Budgeting Smart:
  • Mid-Range is Often Optimal: For lighter side sleepers, you don’t necessarily need the ultra-firm, high-coil-count behemoths designed for heavier individuals. Many mid-range options typically $1,000 – $2,000 for a queen offer excellent pressure relief and support using quality foams and thoughtful construction.
  • Look for Sales: Mattress companies frequently run sales, especially around holidays. Timing your purchase can save you hundreds.
  • Don’t Just Look at Price: Evaluate the materials, construction, and most importantly, the trial period and warranty. A cheaper mattress that sags in two years isn’t a good deal.
• The Power of the Home Trial: This is arguably the most crucial factor when buying a mattress online.
  • Why It’s Essential: You can’t truly know if a mattress is right for you after just a few minutes in a showroom. It takes weeks for your body to adjust to a new sleep surface, and to fully evaluate pressure relief and support.
  • Generous Trial Periods: Most reputable online mattress companies offer 100-night, 120-night, or even 365-night trial periods. This allows you ample time to sleep on the mattress in your own home environment.
  • Return Policies: Before buying, always read the fine print on return policies. Are returns free? Do they pick up the mattress? Are there restocking fees? A hassle-free return policy is a sign of a company confident in its product. For example, Nectar and DreamCloud are known for their generous trial periods.

Temperature Regulation: Staying Cool in Comfort

Sleeping hot can sabotage even the most comfortable mattress. Be 12000 Watt Generator Reviews

For side sleepers, particularly those who sink into softer foams, temperature regulation is a critical consideration.

• The Heat Trap: Softer foams, especially traditional memory foam, can hug your body closely, which reduces airflow around you. This can trap body heat, leading to an uncomfortable, sweaty night’s sleep.
• Cooling Technologies to Look For:
  • Gel Infusions: Many memory foams are now infused with gel, which helps to dissipate heat away from the body.
  • Copper Infusions: Copper is a natural thermal conductor and can draw heat away. It also has antimicrobial properties.
  • Graphite Infusions: Similar to copper, graphite can help transfer heat away from the surface.
  • Phase-Change Materials PCMs: These materials absorb and release heat to maintain a consistent surface temperature. They feel cool to the touch. The Nectar Premier Copper uses both copper and PCMs.
  • Open-Cell Foam: This foam structure has larger, more breathable cells compared to traditional closed-cell foam, allowing for better airflow.
  • Coil Support Hybrids: The open structure of the coil layer in hybrid mattresses allows for significant airflow, making them inherently cooler than all-foam models.
  • Breathable Covers: Mattress covers made from Tencel, cotton, or specialized breathable fabrics can also help wick away moisture and improve airflow.
• Prioritize Airflow: If you’re a hot sleeper, prioritize hybrids or all-foam mattresses with advanced cooling technologies. The Brooklyn Bedding Aurora Luxe Soft, for instance, is specifically designed with cooling in mind, featuring CopperFlex and TitanFlex foams along with a cooling cover. Don’t underestimate the power of a cool sleep environment for deep, restorative rest.

Durability and Longevity for Lighter Sleepers

While lighter individuals put less stress on a mattress, durability is still key.

You want your investment to last, providing consistent comfort and support for years.

• Material Quality Matters Most:
  • Foam Density: For memory foam and polyfoam, density is a good indicator of durability. Higher density foams e.g., 4-5 lbs/cu ft for memory foam, 1.8+ lbs/cu ft for polyfoam tend to be more durable and resist impressions better. However, for lighter sleepers, overly dense top layers can feel too firm. The trick is finding a balance: a softer, responsive top layer backed by a durable, higher-density support layer.
  • Latex: Latex is naturally one of the most durable mattress materials, often lasting 15-20 years.
  • Coil Count and Gauge Hybrids: In hybrid mattresses, a higher coil count often indicates better support and durability. Look for individually wrapped coils pocketed coils as they reduce motion transfer and provide more targeted support. The gauge thickness of the steel also plays a role – thicker gauges lower numbers are more durable but can be firmer.
• Foundation and Frame: A proper foundation is crucial for mattress longevity. Ensure your bed frame provides adequate support – slatted bases should have slats no more than 2-3 inches apart, or use a solid platform. An improper foundation can cause premature sagging, even in a high-quality mattress.
• Rotation: While not all mattresses require it, rotating your mattress head to foot every 3-6 months can help distribute wear evenly, extending its lifespan. Check the manufacturer’s recommendations.
• Warranty: A good warranty typically 10-20 years is a sign of a manufacturer’s confidence in their product’s durability. Read the warranty carefully to understand what it covers e.g., impressions greater than 1 inch and what voids it e.g., improper foundation.

Frequently Asked Questions

What firmness level is best for side sleepers under 130 lbs?

For side sleepers under 130 lbs, a softer to medium-soft firmness level typically 4-6 out of 10 on a 1-10 scale, where 10 is firmest is generally best.

This allows for sufficient sinkage and contouring at pressure points like the shoulders and hips, ensuring proper spinal alignment. Ways To Make Money Through Internet

Do lighter people need a softer mattress?

Yes, lighter people generally need a softer mattress than average or heavier individuals.

They exert less pressure on the mattress surface, so a firmer mattress won’t compress enough to provide adequate pressure relief and body contouring.

What kind of mattress is best for petite side sleepers?

Petite side sleepers benefit most from mattresses with plush comfort layers that offer excellent pressure relief.

This often means memory foam, softer latex, or hybrid mattresses with a soft top layer.

The key is deep contouring around the shoulders and hips. The Nail Gun

Is memory foam good for lightweight side sleepers?

Yes, memory foam is often an excellent choice for lightweight side sleepers due to its exceptional ability to contour closely to the body and provide superior pressure relief, especially around the shoulders and hips.

Look for gel or copper-infused options for cooling.

What is the ideal mattress thickness for a lighter side sleeper?

An ideal mattress thickness for a lighter side sleeper is typically between 10 to 14 inches.

This allows for sufficient comfort layers 3-4 inches being ideal to provide pressure relief, backed by a robust support core to maintain proper spinal alignment without bottoming out.

How important is a trial period when buying a mattress for a lighter side sleeper?

A trial period is extremely important. Smoking On A Regular Grill

Since firmness and comfort are highly subjective, especially for specific weight groups, a home trial 100 nights or more allows you to fully assess if the mattress provides adequate pressure relief and support for your specific body type and sleep position.

Can a firm mattress cause shoulder pain for side sleepers under 130 lbs?

Yes, a firm mattress can very easily cause shoulder pain for side sleepers under 130 lbs.

A firm surface won’t allow the shoulder to sink in sufficiently, leading to pressure build-up and misalignment of the spine in the upper body.

Are hybrid mattresses good for lightweight side sleepers?

Yes, hybrid mattresses can be excellent for lightweight side sleepers.

They combine the pressure relief of foam or latex comfort layers with the responsive support and airflow of individually wrapped coils, offering a balanced feel that can be very beneficial. Used Assault Air Runner For Sale

What is spinal alignment and why is it important for side sleepers?

Spinal alignment refers to maintaining a straight line from your head to your tailbone while sleeping.

For side sleepers, it’s crucial because it prevents unnatural curves in the spine, which can lead to back pain, neck pain, and other discomforts.

A mattress that allows hips and shoulders to sink just right while supporting the waist achieves this.

Do latex mattresses work well for lightweight side sleepers?

Yes, latex mattresses can work very well for lightweight side sleepers, especially Talalay latex, which tends to be softer and more conforming.

It offers a buoyant pressure relief that cradles the body without the “stuck” feeling of some memory foams, and it’s naturally durable and cooling. Milwaukee Tick Review

What is off-gassing and should I be concerned about it?

Off-gassing is a temporary chemical smell that some new mattresses especially those with synthetic foams can emit as volatile organic compounds VOCs are released. It’s generally not harmful but can be unpleasant. Ventilating the room helps.

Most certified mattresses like CertiPUR-US have very low VOC emissions.

How does my pillow affect my sleep as a side sleeper?

Your pillow is critical for side sleepers.

It needs to be thick and supportive enough to fill the gap between your head and the mattress, keeping your neck aligned with your spine.

An inadequate pillow can negate the benefits of even the best mattress and lead to neck pain. Online Services To Earn Money

How much should I expect to pay for a good mattress for a lightweight side sleeper?

You can expect to pay anywhere from $800 to $2,500+ for a good quality queen-size mattress suitable for a lightweight side sleeper.

Prices vary based on materials, brand, and features, but many excellent options are available in the $1,200-$1,800 range during sales.

Will a mattress specifically for side sleepers help with hip pain?

Yes, a mattress specifically designed for side sleepers, especially one that offers excellent pressure relief, is crucial for alleviating hip pain.

It allows your hips to sink adequately into the comfort layers, preventing pressure points and maintaining spinal alignment.

What cooling features should I look for in a mattress?

Look for mattresses with gel, copper, or graphite infusions in their foam layers, phase-change material in the cover, or open-cell foam construction. Gaming Pc Be

Hybrid mattresses with coil bases also promote better airflow, leading to a cooler sleep experience.

Should lightweight side sleepers consider zoned support mattresses?

Yes, lightweight side sleepers should definitely consider zoned support mattresses, especially hybrids.

Zoned support provides softer contouring for shoulders and hips while offering firmer support for the lumbar region, which can significantly improve spinal alignment and comfort.

How long should a good mattress last for a lighter sleeper?

A good quality mattress should last 7-10 years for a lighter sleeper, and some high-quality latex mattresses can last 15-20 years.

While lighter individuals put less stress on a mattress, material quality and proper care still significantly impact longevity. Electric Bike Report Pdf

What is the difference between Dunlop and Talalay latex for mattresses?

Dunlop latex is denser and more supportive, often used in support cores.

Talalay latex is softer, more conforming, and breathable, making it generally preferred for comfort layers in mattresses for lighter side sleepers due to its superior pressure relief.

Can a lightweight person sleep on a mattress designed for average weight sleepers?

A lightweight person can sleep on a mattress designed for average weight sleepers, but it might feel too firm and not provide adequate pressure relief. They might experience more pressure points and less contouring, leading to discomfort.

What if I sleep on my side but sometimes switch to my back?

If you’re primarily a side sleeper but occasionally switch to your back, a medium-soft to medium hybrid mattress might be a good compromise.

It offers the pressure relief needed for side sleeping while providing enough support for occasional back sleeping without excessive sinkage. Ebike How Does It Work

Is mattress firmness affected by temperature?

Yes, mattress firmness, especially with traditional memory foam, can be affected by temperature.

Memory foam tends to be firmer in cooler rooms and softens as it warms up with body heat.

This is less pronounced in hybrid or latex mattresses.

Do I need a special bed frame for a new mattress?

Most mattresses work with standard bed frames, but it’s essential to ensure your frame provides adequate support.

For foam mattresses, a solid platform or a slatted base with slats no more than 2-3 inches apart is crucial to prevent sagging and maintain warranty validity. Start Making Money

How can I tell if my current mattress is causing my side-sleeping pain?

If you wake up with pain in your shoulders, hips, lower back, or neck that tends to dissipate throughout the day, it’s a strong indicator your mattress isn’t providing proper support or pressure relief for your side-sleeping posture.

Trying a different sleep surface like a hotel bed can also provide clues.

What are common mistakes lightweight side sleepers make when buying a mattress?

Common mistakes include buying a mattress that’s too firm, not considering specific pressure relief needs, ignoring the importance of a trial period, and not checking the return policy.

Also, sometimes neglecting to upgrade their pillow.

Should I get a softer mattress if I have arthritis or joint pain as a side sleeper?

Yes, if you have arthritis or joint pain and sleep on your side, a softer mattress with excellent pressure relief is highly recommended.

It allows your sensitive joints to sink into the mattress without resistance, cushioning them and alleviating pressure points that can exacerbate pain.

How does motion isolation affect lightweight side sleepers sharing a bed?

Motion isolation is crucial for lightweight side sleepers sharing a bed because their lighter weight means they are more easily disturbed by a partner’s movements.

A mattress with excellent motion isolation like memory foam or individually wrapped coils will prevent disturbances, ensuring a more restful sleep.

What is CertiPUR-US certification and why is it important?

CertiPUR-US certification means the foam in your mattress has been independently tested and certified to meet specific standards for content, emissions, and durability.

It ensures the foam is made without harmful chemicals like ozone depleters, heavy metals, formaldehyde, and has low VOC emissions, making it safer for you and your home.

Can I use a mattress topper instead of buying a new mattress for pressure relief?

A mattress topper can provide temporary additional softness and pressure relief.

However, if your underlying mattress is too firm or lacks proper support, a topper might not fully solve the problem.

It can be a good short-term solution but isn’t a substitute for a mattress that provides foundational support and comfort.

How does mattress edge support impact side sleepers?

While side sleepers typically sleep in the middle of the bed, good edge support is still beneficial.

It prevents the feeling of rolling off the bed, makes it easier to sit on the edge e.g., when getting dressed, and maximizes the usable sleep surface, which is great if you share the bed.

What role does body contouring play for lightweight side sleepers?

Body contouring is paramount for lightweight side sleepers.

It refers to how well the mattress molds to the unique curves of your body.

Excellent contouring ensures that your shoulders and hips sink in adequately, distributing weight evenly and preventing pressure points, which is vital for maintaining a neutral spinal alignment in this position.